Martin MAC III Profile User Manual page 22

• Pan/tilt limits
• Calibration offsets
Defining calibration offsets via DMX
The "Fixture adjustments/calibration" DMX channel allows
effect offsets to be adjusted and stored in the fixture from
the DMX controller.
To adjust an effect offset:
1. Set the effect to a DMX value from 0 to 255 on its own
DMX channel (for example, set Cyan to 192 on channel
3 in 16-bit mode or 4 in 16-bit extended mode).
2. Send a 'Store' command for the effect on the Fixture
Adjustment/Calibration channel (for example, send
DMX value 130-134 on channel 27 in 16-bit mode or
30 in 16-bit extended mode to store the Cyan
adjustment).
The MAC III Profile now reads the value on the effect
channel (192 for Cyan in the example above), translates it
to an adjustment value of between -5% and +5% as shown
in Figure 12 (+2.5% Cyan adjustment in the example
above) and stores that offset in memory.
See "Fixture adjustments/calibration" in the DMX protocol
on page 51 for details of the offsets that can be adjusted
using this method.
Effect offsets stored in memory are not affected by
powering the fixture off and on or by updating the fixture
software. To return all offsets to their factory defaults, send
a DMX value from 245 to 249 on the "Fixture
adjustments/calibration" channel or apply LOAD FACTORY SETTINGS in the FACTORY SETTINGS menu
in the fixture's control panel.
22 MAC III Profile user manual
255 +5%
192 +2.5%
128
64 -2.5%
0 -5%
Effect channel Adjustment
value
Figure 12: Offset adjustment values
0
value